Famous beards

San Francisco Giants relief pitcher Brian Wilson pitches to the Texas Rangers in the ninth inning during Game 1 of Major League Baseball's World Series in San Francisco, on Oct. 27. Mike Blake/Reuters

Former Cuban leader Fidel Castro speaks during celebrations to commemorate the 50th anniversary of the creation of the Committees for the Defense of the Revolution (CDR) in Havana, on Sept. 28. Desmond Boylan/Reuters

In this Feb. 11, 2009 file photo, actor Joaquin Phoenix arrives for a taping of 'The Late Show with David Letterman' in New York. Charles Sykes/AP/File

Former US president Abraham Lincoln, is shown in this November 8, 1863 file photo. Alexander Gardner/AP/File

Author Ernest Hemingway is shown in this undated photo. AP

This is an undated photo of a sketch of Gen. Ulysses S. Grant. AP

This portrait shows British scientist Charles Robert Darwin, who proposed the theory of evolution. AP

Painting of Mogol conqueror Genghis Khan, from an exhibition in Mongolia on the 840th anniversary of his birth.

'Self-portrait with Felt Hat' by Vincent van Gogh. Newscom

Billy Gibbons of ZZ Top performs at the Center in Dallas, Texas. Jason Janik/Splash News/Newscom

An exemption to the Digital Millennium Copyright Act allows hackers to conduct good will research into medical devices, automobiles, and other internet-connected devices without threat of lawsuits from manufacturers.